Abstract
Organic materials are broken down by various microbial populations during a biological process known as anaerobic digestion to produce biogas, which is a sustainable source of energy. This study developed a mathematical model that can accurately simulate the behavior of a biogas plant. In this work Haugen, Mirquez models were used to validate experimental results. The mathematical model was developed by modification of the Haugen model and validation of experimental work was done. The modified Haugen model's coefficient of determination was 0.91, indicating that it correctly predicted the experimental data. Further, the modified Haugen model was used to find the optimum temperature for biogas production from faecal sludge by using data of various temperatures. The optimum temperature value obtained for anaerobic digestion of faecal sludge was 30 °C that produced the highest biogas production in a steady state. This developed modified Haugen model can be further used to find other parameters and optimize the anaerobic processes.
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